SAT 语法 改进句子题

题目

SAT 语法 改进句子题
He was convinced that (if property taxes would have rose) any higher,he would have had to move to a different area.
括号部分为划线,答案说替换成C,为什么D不对呢?
B if property taxes would rise
C if taxes had risen
D had property taxes rose
E were property taxes to rise

答案

过去时态的虚拟
d的话 had done rose应该用过去分词 而不是过去式
if A had done 变成倒装就是 had A done
所以D就不对了
C是正确的